I'm betting the farm that we cover.
One interesting thing this season is that NU is really hard to predict --- that is, will the Huskers play w/o penalties, without turnovers and with few mental mistakes? If so, then NU easily covers that spread. If not, they do not.
OU is a little unpredictable too (well, their offense is predictably good at all times) --- but their defense is sometimes good other time awful.
So.... who knows? I think it really, really unlikely that we win --- but to cover the 21.5 points is something that I think we will do (unless we do the turnover thing and kill ourselves with penalties).